Electrical warp stop-motion for looms.



No. 658,237. Patented Sept. l8, I900. J. COLDWELL &. C. G. GILDARD.ELECTRICAL WABP'STOP MOTION FOR LOOMS.

(Application filed Jan. 11, 1900.} (No Model.) 2 Sheets-Sheet l.

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No. 658,237. Patented Sept. l8, I900.- J. COLDWELL & C. G. GILDABD.ELECTRICAL WARP STOP MOTION FOR LOOMS.

(Application filed Jan 11, 1900.)

2 Sheets$heet 2.

(No Model.)

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NlTED STATES ATENT EFICE.

JOSEPH OOLDWELL AND CHRISTOPHER GILES GILDARD, oEFALL RIVER,

- MASSACHUSETTS.

ELECTRICAL WARP STOP-MOTION FOR LOOM S.

SPECIFICATION forming part of Letters Patent No. 658,237, datedSeptember 18, 1900. Application filed January 11, 1900. Serial No.1,139. (No model.)

To all whom it"mcty concern:

Be it known that we, J OSEPH OoLDWELL and CHRISTOPHER GILEs of theUnited States, residing at Fall River, in the county of Bristol andState of Massachusetts, have invented certain new and usefulImprovements in Electrical Warp Stop- Motions for Looms; and We dohereby declare the following to be afull, clear, and exact de-'scription of the invention, such as will enable others skilled in theart to which it appertains This invention relates to certainimprovements in the construction described and illustrated in UnitedStates Letters Patent granted us November 21, 1899, and numbered 637,234and 637,235, for improvements in electricallyoperated stop-motions forlooms.

Our present invention has for its objects (a) to simplify theconstruction of the loom mechanism and to avoid liability of accidentalmisadjustment of the parts composing the same, all of which weaccomplish by casting integral certain parts composing the same andheretofore separately constructed, and (b) to reduce the vibrations ofthe electrical conducting guide-rods and strongly brace the same betweentheir points of support.

With these specified and well-defined objects in View our inventionconsists in certain features of construction hereinafter pointed out,and particularized in the claims.

Referring to the drawings, Figure 1 is aside elevation of so much of anordinary loomframe as is necessary in order to show the application ofour invention. Fig. 2 is a longitudinal sectional view on the line 2 2,Fig. 1, looking in the direction indicated by the arrow. Fig. 3 is atransverse vertical sectional view on line 3 3, Fig. 2. Fig. 4 is adetail in perspective of one of the head-castings. Fig. 5 is a detail inelevation of the bridge-piece. Fig. 6 is a detail in perspective of onecorner of the loom-frame, hereinafter referred to. Fig. 7 is ahorizontal sectional view through the magnet box or case. Fig. 8 is adetail of the contact employed and hereinafter referred to. Similarletters of reference indicate similar parts in all the figures of thedrawings.

Between the side frames or of the loom We locate a pair of angularbrackets b, which GILDARD, citizens have slots 19' near their lower endsto receive adj usting-bolts b b whereby the said brackets b are adjustably supported between the side frames. At the inner angles of thebrackets b are formed integral therewith a pair of U-shaped or otherbearings c, and below the Same and extending inwardly a pair ofhorizontal lugs c, perforated for the reception of adj usting-scre'ws 0The bearings 0 receive the axial ends or trunnions of a loose tubularcontact-roll d, preferably formed of copper.

The trunnions d are fitted in the ends of the said contact-roll, may beformed of wood or other electrical non-00nd noting material, and one ofthem may have an axial bore or perforation d Upon the adjusting-screws cheretofore referred to, are supported the opposite ends of a wiper-bare, the same having its upper side preferably concaved to agree with thecontact-roll against which it rests andalso faced with some textilematerial, as c, to which lint, 850., will adhere When the contact-rollis rotated for the purpose of cleaning the same.

Each of the two brackets b terminate above the contact-roll in a pair ofinwardly-disposed horizontal attaching-lugs b the same being slottedlongitudinally to receive adjust-ingbolts E2 by means of which a pair ofhorizontally-disposed parallel circuit-rods f are adjustably supported.

To the upper ends of the brackets b is nonadjustably secured by bolts ha pair of angular brackets h, the upper ends of which may be T-shapedand each of which may have formed on its inner face a pair ofround-ended studs h which may be removably fitted into the ends of apair of horizontally-disposed tubular lease-rods 71, preferably formedof enameled bicycle-tubing. or inverted-L-shaped brackets h is furtherprovided on its inner face and below the round-ended studs h with aseries of three horizontal tubular bosses h into which are secured theopposite ends of aseries of three metallic tie-rods if, the ends of saidrods being preferably loose or removable from the said teats. Thetie-rods it pass through and accurately fit perforations h formed nearthe upper ends of a metallic bridge-piece h the lower edge of which isprovided with a pair of Each of the angular converging slots or kerfs7L8, that receive and -Z the operating-lever to be moved by the erlyadjusted the constant vibrations of the securely hold against vibrationthe circuitrods f. These rodsfform guides forand support when nototherwise supported a series of drop-bars g of any desired design inproper relative position with the contact-roll d. The drop-bars g arenormally supported by the warp-threads of the loom, and when sosupported out of contact with the contact-roll, as shown in Fig. 3,their upper portions lie between the tie-rods 77.

j designates the shipper, 7r; the notched plate by which it is lockedand guided, and

shipper.

A bracket m supports a magnet box or case i m, which latter is ofrectangular shape in cross-section and has fulcrumed in its front uppercorner an armature-lever m The induction-coils of the magnets are formedon square-ended spools qn so that they may be forced within the box orcase, as a driving fit, and hence incapable of being jarred out ofplace.

The remainder of our invention may be the same as described in theformer patents herein referred to and to which we will now brieflyrefer.

Rising from bracket m is a stud m having a contactspring m in electricalcontact with the shipper j when in engagement with the aforesaid notchof the plate 7c. When in this position, it will be possible for thedropbar or detector 9 to complete the circuit by contacting with themetallic contact-roll d; but when the shipper is at the inner end of theslot in plate such contact is broken by the shipper moving away fromspring m and it is impossible to eifect the circuit.

On the stud m is a binding-post m and from it leads to the pole of themagnet m a circuit-wire m 72 designates the knockoff, 'n thegravitylatch, and n the notch or shoulder formed therein.

a is a wire rod connecting the latch to the armature-lever m so thatthere is a unity of motion between the two. It will be obvious that ifthe magnet attracts the armature, as when the circuit is completedthrough one of the drop-bars, the armature-lever will rise at its outerend and will elevate the latch 71 into the path of the lay, by whichlatter it is struck, and together with the knockoff is forced forward,the latter striking the shipper j and disengaging the same from thenotch in the guide-plate Z0, permitting the shipper to spring inward andoperate the belt-shifter to stop the loom, all as is usual, and to breakcontact with the contact-spring m.

The battery 0 or other source of electrical supply may be located belowthe floor, and from one of its poles leads the insulated circuit-wire qand from the other the insulated circuit-wire p. The wire q passes tothe magnet and the wire p passes through the tubular bolt b From theinner end of the bolt the wire 19 passes upwardly through a perforation1' in the bracket 1) and from thence through the longitudinal bore dformed in the axial plug or journal (1 of the contact-roll d and intothe latter, where it may terminate in any form of contact-as, forinstance, a coil 3, mounted loosely and slidably in said roll. Fromthence the circuit is completed through the loom-frame.

We found by experience that where the parts 0' andc were made adjustableand therefore separate from the bracket 11 operators were apt to get animproper adjustment of these parts, and, moreover, even when proploomexerted a tendency to loosen the bolts. To avoid this trouble, wetherefore have improved our former construction by casting these partsintegral, as hereinbefore described. We also found it desirable toprovide some means of rendering more rigid the circuit-rods and avoidingin them so far as possible the vibrations to which they are subjected bythe operation of the loom. These vibrations were objectionable in thatthey were conveyed to the drop-bars or detectors, and they beingsupported by the warp-threads interfered with their free movements. Bythe arrangement described the circuit-bars are now practically rigid anddo not, therefore, have any elfect upon the drop-bars, which latter arealways free to instantly drop upon the occasion of the breaking of awarp-thread, and thus close the circuit.

Having thus fully described our invention, what we claim is- 1. Anelectrically-operated stop-motion for looms comprisinglongitudinallyarranged circuit-rods, and a lower intermediate electricalconductor, opposite series of drop-bars loosely embracing saidcircuit-rods and normally supported out of contact with the aforesaidelectrical conductor by the warp-threads of the loom, said circuit-rodsserving to guide said drop-bars in their movements toward the conductor,tie-rods located above the circuit-rods, and a bridge-piece carriedthereby and having lower slotted portions embracing said circuit-rods.

2. An electrically-operated stop-motion for looms comprisinglongitudinally -arranged circuit-rods and an intermediate electricalconductor, drop-bars loosely embracing said circuit-rods and adapted tobe normally supported out of contact with the aforesaid electricalconductor by the warp-threads of the loom, said circuit-rods serving toguide said drop-bars in their movements toward the conductor, and abridge-piece having converging slots arranged to embrace saidcircuit-rods, whereby their vibrations are arrested.

3. An electrically-operated stop-motion for looms, comprising thebrackets I), having the integral bearings c and lugs c, the contactrolld and wiper-bar e, the upper brackets h secured to the brackets 11, thelugs h h", the

lease-rods z', tie-rods h circuit-bar's f, and the bridgepiece hperforated to receive the tie-rods and slotted at its lower end as at kto receive the circuit-bars.

4:. An electrically-operated stop=motion for looms comprisingsupporting-brackets, a contact-r011 mounted therebetween, circuit-barsalso mounted between said brackets, supplemental brackets supported bysaid former brackets and provided with a series of tubular bosses,tie-rods loosely mounted in said bosses, and a bridge-piece carried bysaid tie= rods and engaging said circuit-rods.

5. An electrically-operated stop-motion for looms,comprisingsupporting=braokets,a contact-roll mounted therebetween,circuit-bars also mounted between said brackets, supple; mental bracketssupported by said former" brackets and provided with a series of tubularbosses, studs formed on said latterbrackets; tubular lease-rods mountedthereon, tie rods loosely mounted in said bosses, and a bridge=piececarried by said tie=rods and engaging said circuit-rods-.- p

In testimony whereof we affix our signatures in the presence of twowitnesses.

JOSEBH OOLDWELL. CHRISTOPHER GILES GILDARD.

Witnesses? W. A. RAMSBOTTOM, I JAMES A. MAooMBER.

